Chastotali konvertorlar Poming HPA-3110, HPA-3115, HPA-3120 va boshqalar.

Hozirgi vaqtda ko'plab sanoat mashinalari va uskunalarini, shuningdek, qurilmalar va turli xil asboblarni boshqarish uchun asenkron dvigatel yordamida amalga oshiriladi. Ular juda ko'p aniqlovchi afzalliklarga va yoqimli xususiyatlarga ega, buning natijasida u keng qo'llaniladi va ko'p holatlarda eng yaxshi variant hisoblanadi.
Ammo uning asosiy kamchiligi shundaki, haydovchi doimiy rejimda bir xil tezlikda ishlaydi. Faqat kuchlanish unga ta'sir qilishi mumkin, ammo uni haydovchiga mustaqil ravishda sozlash deyarli mumkin emas.

Ushbu muammoni chastota konvertorlarini joriy etish bilan deyarli to'liq hal qilish mumkin edi. Ushbu qurilmalar juda ixcham birliklar bo'lib, ular magnit maydonni kamaytirish orqali dvigatel zanjiridagi kuchlanishni kamaytiradi, shuning uchun uning aylanish tezligini turli xil nosozliklarsiz kamaytirish mumkin. Hozirgi vaqtda chastotalar deb ataladigan eng maqbul va ba'zan mumkin bo'lgan yagona variant.

Modellar: HPA-11005, HPA-1101, HPA-1102, HPA-1103, HPA-1105, HPA-1108, HPA-1110, HPA-1115, HPA-1120, HPA-1130, HPA-1145, HPA-1160, HPA-1175, HPA-1190, HPA-3110, HPA-3115, HPA-3120, HPA-3130, HPA-3145, HPA-3160, HPA-3175, HPA-3190, HPA-31100, HPA-31120, HPA-31150, HPA-1303, HPA-1306, HPA-1310, HPA-1315, HPA-1320, HPA-1330, HPA-1345, HPA-1360, HPA-1375, HPA-1390, HPA-13100, HPA-3310, HPA-3315, HPA-3320, HPA-3330, HPA-3345, HPA-3360, HPA-3375, HPA-33100, HPA-33120, HPA-33150, HPA-33180, HPA-33200, HPA-33250, HPA-33300, HPC-1005, HPC-1010, HPC-1020, HPC-1030, HPC-1050, HPC-1080, HPC-1100, HPC-1150, HPC-1200, HPC-3015, HPC-3030, HPC-3060, HPC-3100, HPC-3150, HPC-3200, HPC-3300, HPC-3450, HPC-3600.